This is a front-end for the Online Encyclopedia of Integer Sequences, made by Christian Perfect. The idea is to provide OEIS entries in non-ancient HTML, and then to think about how they're presented visually. The source code is on GitHub.
%I A025522 #5 Mar 30 2012 18:35:25 %S A025522 2,3,2,19,18,17,16,24,23,22,21,20,58,57,341,340,339,338,337,336,335, %T A025522 334,333,332,331,330,329,328,327,326,325,324,323,322,649,648,647,646, %U A025522 645,863,862,861,860,859,858,857,856,855,854,853,852,851,850,849,848,847,846,845 %N A025522 Least k>1 such that reverse complement of first n terms of A022303 repeats beginning at k-th term. %K A025522 nonn %O A025522 1,1 %A A025522 _David W. Wilson_